Maidenhead Aquatics St Mellons

Maidenhead Aquatics St Mellons Established in 1984, Maidenhead Aquatics is the UK's largest aquatic retailer.

This store specialises in a huge range of livestock, plants and products for fishkeeping in both aquariums and ponds.

03/06/2026

Nice fish delivery last night. Some beautiful bettas, including some rare wild species. Pop in and see what takes your fancy.

25/05/2026

We are open until 5:30pm today for all your aquarium or pond needs. Pop in and grab something nice on this lovely, sunny day 😎

**The Ultimate Glow-Up in the Aquarium Hobby? 🌟🐟**If you're into rare L-number plecos, you already know that *Hypostomus...
20/05/2026

**The Ultimate Glow-Up in the Aquarium Hobby? 🌟🐟**
If you're into rare L-number plecos, you already know that *Hypostomus luteus* (often called the Golden Sailfin Pleco) is an absolute holy grail fish. Hailing from the fast-flowing waters of the Rio Uruguay, this monster pleco is famous for one mind-blowing feature: its color phases.
Unlike most fish that keep the same pattern as they grow, *H. luteus* goes through a dramatic, multi-stage transformation that leaves hobbyists captivated.
Here is how the legendary color transition breaks down:
⚫ **Phase 1 (The Juvenile Look):** As youngsters, they look like a completely different species! They sport a dark black or deep charcoal body covered in bright yellow or gold spots.
🟡⚫ **Phase 2 (The "Mottled" Transition):** This is where the magic happens. As the fish grows (usually reaching around 8–10 inches), the black base starts to recede. It breaks apart into patches, creating a stunning, high-contrast black-and-gold mottled effect. No two Phase 2 fish look exactly alike!
💛 **Phase 3 (The Solid Gold Holy Grail):** In mature adults, the black pigment vanishes almost entirely. You are left with a massive, prehistoric-looking fish clad in a breathtaking, solid golden-yellow armor. Check out that incredible coloration below!
Because these fish grow slowly and require pristine, highly oxygenated water, watching one transition through these phases in your own tank is the ultimate test of patience and fish-keeping skill.
Have you ever kept a Luteus Pleco, or is this one sitting firmly at the top of your dream fish bucket list? 👇 Drops your thoughts (or tank photos!) in the comments below!

19/05/2026

Instock now, only 1 available. Hypostomus luteus phase 1. Looking amazing. 2 more phases before it looks like a bar of gold. Look it up.

14/05/2026

Some beautiful bettas currently in stock.

14/05/2026

Brazil has come to Wales! Plenty of L number plecs, plus wild green severums.

13/05/2026

Some mega electric blue rams have hit the tanks. Pop in and check them out.

27/04/2026

We couldn't get chilli rasbora, so we got the next best thing. Large spotted rasbora. Boraras maculatus. Just starting to colour up.

26/04/2026

Very short staffed today,might be a wait to be serviced. Sorry for any inconvenience caused.

24/04/2026

Nice delivery in this week. Some beautiful fish in stock. Come and grab yourself something nice for your aquarium.

Address

Newport Road
Cardiff
CF32WJ

Opening Hours

Monday 9:30am - 5:30pm
Tuesday 9:30am - 5:30pm
Wednesday 9:30am - 5:30pm
Thursday 9:30am - 5:30pm
Friday 9:30am - 5:30pm
Saturday 9:30am - 5:30pm
Sunday 10:30am - 4:30pm

Telephone

+442920364069

Website

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